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Page Title:
CTIS OVERSPEED WARNING LIGHT DOES NOT ILLUMINATE AND/OR OVERSPEED PRESSURE CHANGE (cont) |
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 TM 9-2320-366-20-3
TM
m6. CTIS OVERSPEED WARNING LIGHT DOES NOT ILLUMINATE AND/OR OVERSPEED PRESSURE CHANGE
m6.
(CONT)
WARNING
KNOWN INFO
TEST OPTIONS
Read WARNING
5.
Circuit breaker OK.
Voltage Test or
on following page.
Power supplied to CTIS.
STE/ICE-R Test #89
Is 24 vdc present on P110E
Speedometer OK.
REASON FOR QUESTION
power input to ECU for
Indicator display lights OK.
CTIS overspeed indicator
warning light?
CTIS cable-speed signal
will not work without 24
OK.
vdc to P110E.
Cab dashboard wiring
harness - speed signal OK.
Cab dashboard wiring
NO
harness - LED input to
CTIS cable OK.
POSSIBLE PROBLEMS
Faulty CTIS cable - LED
Go to step 9 of this fault.
input to ECU.
YES
Faulty ECU - O.S pressure
change function.
Faulty overspeed indicator
LED.
Faulty cab dashboard
wiring harness - ground
for LED.
Faulty cab dashboard
wiring harness - power
to LED.
Faulty CTIS cable power
to LED.
Faulty ECU - O.S. warning
indicator function.
Replace CTIS ECU
(para 12-6).
2-2130
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